Balanced-propeller gear.



. A. B. HOLSON.

BALANCED PBOPELLER GEAR. APPLICATION FILED 001. 11. 1910,

1,001 956. V Patented Aug. 29, 1911.

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less freely in the respective cylinders of the engine, the two propellers being operated by the passage of the machine through the air and the engine being driven by the action of the propellers, thereby retarding the descent of the nia'chinc. the propellers having the client of a parachute.

'While the speed reducing mechanism above desrribedis particularly adapted and intended for use in connection wlth a balanced propeller. as above described, it is applicable in connection with any two members which. are to be driven in opposite dfreetions'j'and' at low speed, as compared with the driving motor. i i

'hat T claim is: A

l The combination of two rotatable driven members. annular gears on said members, a driving member. pinions on said driving l'l'lCllllNl engaging with said annular ears, the engagement being on opposite si es of the rotative axis of the annular gears and on the same side of the axis of said pinions, whereby said annular gears and the membersconnected thereto are rotated in opposite directions. 7

2. The combination of two propellers having oppositely fixed blades, annular gears connected to the respective propellers, a mo t FRANK L. A. GRAHAM.

tor mounted within said annular gears and comprising a shaft, pinions on said motor. shaft engaging respectively with said annular gears to rotate said propellers in opposite directions, the blades of said propellers being oppositely pitched, so that in their reverse rotation, the reactive eflfect of the propellers on the air will be in the same direction.

3. The combination of two pro ellers comprisingtrings and blades exten ing therefrom, annular bearings on which said rings are mounted to rotate, annular ears on the respective rings, a motor inclose within said annular bearings and connected thereto, said motor conipl'isiliga--shaft and means for r0- tation thereof, pmi ons on said shaft at 0pposite ends of said motor engagin respectively with said annular gears to rive the annular gears in opposite directions, the blades of the propellers being oppositely pitched, so that in the reverse rotation thereof the reactive effect on the air will be in the same direction.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 5th day of October, 1910.

ALBERT -B. HOLSON. ln presence of Ami-Inn P. KNIGHT, 

